Section V. ASSEMBLY AND INSTALLATION OF TANK ACCESSORIES

TM 5-5430-209-12

MANHOLE COVER

EMERGENCY VENT

ACCESS LADDER RAIL

BOLT

LADDER STEP

LADDER BRACE

HAND RAIL

Figure 3-24. Access ladder installed.

Section V. ASSEMBLY AND INSTALLATION OF TANK ACCESSORIES

3-17. Emergency Vent

3-18. Manhole Air Intake

a. General. The emergency vent consists of a one

a. General. The manhole air intake consists of a

piece, flanged, round, cast steel body fitted with lugs for

one-piece, round flanged, sheet steel dust restrictor; a

a hinged vent. The vent is a one-piece, round, cast steel

one-piece, round, fabricated, steel bar inside screen

body fitted with a lifting handle and hinge lugs. The vent

ring; and a copper insect screen.

comes attached to the flanged body hinges and seals

b. Installation.

(1) Wrap insect screen around inside screen

the deck opening.

ring. Join screen ends with copper wire.

b. Installation.

(2) Install an outside screen ring at top and

(1) Place manhole cover gasket over

bottom of insect screen to hold it in place. Make sure

boltholes at opening in cover (1, fig. 3-24). Insert 1/2-by

screen is not knocked out of position. Tighten the bolts.

11/2-inch bolts through 2-bolt-hole channels. Work

(3) Install screen ring on top flange of dome

through the 8-inch hole, and insert bolts through cover

and gasket.

(2) Install vent (2) over the bolts.

(3) Install nuts on bolts and tighten.

3-21